Frequency Points Allocation Algorithm in Cluster-Based Sensor Network

Characteristics of wireless sensor network are mainly featured in three aspects such as numerous nodes and large-scale networks and restricted operation ability. A frequency points allocation algorithm is proposed in order to decrease collision probability with increasing traffic load in this paper. Based on the coloring, nodes with different frequency points in different cluster can communicate with each other to reduce collision probability and avoid disturbance among clusters, especially for hidden-terminal problem by distributed control mode and power control. Test results of frequency points allocation in three power of ZigBee 2.4G show that it can reach the designed goal and costs less.